Notched like a saw (8)
I believe the answer is:
serrated
'notched like a saw' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for serrated that I've seen before include "Having saw-teeth like retreads" , "Saw description" , "With a saw edge" , "Saw-like" , "With a jagged edge" .)